Multi-source cooperation with full-diversity spectral-efficiency and controllable-complexity

被引：21

作者：

Ribeiro, Alejandro ^{[1
]}

Wang, Renqiu ^{[1
]}

Giannakis, Georgios B. ^{[1
]}

机构：

[1] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA

来源：

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS | 2007年 / 25卷 / 02期

关键词：

multiaccess communication; diversity methods; complex field coding; user cooperation;

D O I：

10.1109/JSAC.2007.070216

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A general framework is developed for multi-source cooperation (MSC) protocols to improve diversity and spectral efficiency relative to repetition based alternatives that rely on single-source cooperation. The novel protocols are flexible to balance tradeoffs among diversity, spectral efficiency and decoding-complexity. Users are grouped in clusters and follow a two-phase MSC protocol which involves time division multiple access (TDMA) to separate users within a cluster, and code division multiple access (CDMA) used to separate clusters. An attractive protocol under the general MSC framework relies on distributed complex field coding (DCFC) to enable diversity order equal to the number of users per cluster. Cluster separation based on orthonormal spreading sequences leads to spectral efficiency 1/2. When the number of clusters exceeds the amount of spreading, spectral efficiency can be enhanced without sacrificing diversity, at the expense of controllable increase in complexity. Simulations corroborate our analytical claims.

引用

页码：415 / 425

页数：11

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